【英文标准名称】:StandardTestMethodforBearing/BypassInteractionResponseofPolymerMatrixCompositeLaminatesUsing2-FastenerSpecimens
【原文标准名称】:承受/旁通用2种紧固样品的聚合物基质复合叠层碾压的交感响应的标准试验方法
【标准号】:ASTMD7248/D7248M-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D30.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:bearing/bypassproperties;bearingstrength;bypassstrength;compositematerials;Laminates(aerospace);Polymers(composites)
【摘要】:Thistestmethodisdesignedtoproducebearing/bypassinteractionresponsedataforresearchanddevelopment,andforstructuraldesignandanalysis.Thestandardconfigurationforeachprocedureisveryspecificandisintendedasabaselineconfigurationfordevelopingstructuraldesigndata.ProcedureA,thebypass/highbearingdouble-shearconfigurationisrecommendedfordevelopingdataforspecificapplicationswhichinvolvedoubleshearjoints.ProcedureB,thebypass/highbearingsingle-shearconfigurationismoreusefulintheevaluationoftypicaljointconfigurations.Thespecimenmaybetestedineitheranunstabilized(nosupportfixture)orstabilizedconfiguration.Theunstabilizedconfigurationisintendedfortensileloadingandthestabilizedconfigurationisintendedforcompressiveloading.Theseconfigurations,particularlythestabilizedconfiguration,havebeenextensivelyusedinthedevelopmentofdesignallowablesdata.Thevariantsofeitherprocedureprovideflexibilityintheconductofthetest,allowingadaptationofthetestsetuptoaspecificapplication.However,theflexibilityoftestparametersallowedbythevariantsmakesmeaningfulcomparisonbetweendatasetsdifficultifthedatasetswerenottestedusingidenticaltestparameters.ProcedureC,thebypass/lowbearingdouble-shearhardpointconfigurationisrecommendedfordeterminingtheeffectoflowbearingstresslevelsonbypassstrength.Whileasimilarsingle-shearconfigurationcouldbetested,thereisinsufficientexperiencewithasingle-shearconfigurationtorecommenditsuseatthistime.Generalfactorsthatinfluencethemechanicalresponseofcompositelaminatesandshouldthereforebereportedincludethefollowing:material,methodsofmaterialpreparationandlay-up,specimenstackingsequence,specimenpreparation,specimenconditioning,environmentoftesting,specimenalignmentandgripping,speedoftesting,timeheldattesttemperature,voidcontent,andvolumepercentreinforcement.Specificfactorsthatinfluencethebearing/bypassinteractionresponseofcompositelaminatesandshouldthereforebereportedincludenotonlytheloadingmethod(eitherProcedureAorB)andloadingtype(tensionorcompression)butthefollowing(forbothprocedures):edgedistanceratio,widthtodiameterratio,diametertothicknessratio,fastenertorque,fastenerorpinmaterial,fastenerorpinclearance;and(forProcedureBonly)countersinkangleanddepthofcountersink,typeofgrommet(ifused),typeofmatingmaterial,andtypeofsupportfixture(ifused).Properties,inthetestdirection,whichmaybeobtainedfromthistestmethodincludethefollowing:Filledholetensilebearing/bypassstrength.Filledholecompressivebearing/bypassstrength.Bearingstress/bypassstraincurve.1.1Thistestmethoddeterminestheuniaxialbearing/bypassinteractionresponseofmulti-directionalpolymermatrixcompositelaminatesreinforcedbyhigh-modulusfibersbyeitherdouble-sheartensileloading(ProceduresAandC)orsingle-sheartensileorcompressiveloading(ProcedureB)ofatwo-fastenerspecimen.Thescopeofthistestmethodislimitedtonetsection(bypass)failuremodes.Standardspecimenconfigurationsusingfixedvaluesoftestparametersaredescribedforeachprocedure.Anumberoftestparametersmaybevariedwithinthescopeofthestandard,providedthattheparametersarefullydocumentedinthetestreport.Thecompositematerialformsarelimitedtocontinuous-fiberordiscontinuous-fiber(tapeorfabric,orboth)reinforcedcompositesforwhichthelaminateisbalancedandsymmetricwithrespecttothetestdirection.Therangeofacceptabletest......
【中国标准分类号】:G31
【国际标准分类号】:59_100_01
【页数】:30P.;A4
【正文语种】:英语


【英文标准名称】:ElectromagneticcompatibilityandRadiospectrumMatters(ERM)-ShortRangeDevices(SRD)-Ground-andWall-ProbingRadarapplications-Part1:technicalcharacteristicsandtestmethods(V1.1.1).
【原文标准名称】:电磁兼容性和无线电频谱情况(ERM).短程装置(SRD).地和墙探测雷达装置.第1部分:技术特征和试验方法(V1.1.1)
【标准号】:NFZ82-066-1-2006
【标准状态】:现行
【国别】:法国
【发布日期】:2006-02-01
【实施或试行日期】:2006-02-20
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:简要注释;数据传输;定义;信息流;信息交换;信息技术;综合业务数字网;专业综合服务网;私人网络;服务设施;短信息业务;短信息;信号发送系统;规范(验收);电信系统;电信
【英文主题词】:Briefnotes;Datatransmission;Definition;Definitions;Informationflow;Informationinterchange;Informationtechnology;ISDN;PISN;Privatenetworks;Services;ShortMessageService;Shortmessages;Signallingsystems;Specification(approval);Telecommunicationsystems;Telecommunications
【摘要】:
【中国标准分类号】:M53
【国际标准分类号】:33_060_20
【页数】:22P;A4
【正文语种】:其他